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Citation

Alghamdi, Amjad S. and Hine, Peter J. and Ries, Michael (2023) Data for Time−Temperature Superposition of the Dissolution of Wool Keratin in the Ionic Liquid 1 Ethyl-3-methylimidazolium Acetate. University of Leeds. [Dataset] https://doi.org/10.5518/1391

Dataset description

The dissolution of wool yarns in the ionic liquid 1-ethyl-3-methyl-imidazolium acetate [C2mim][OAc] has been investigated. Wool yarns were submerged into [C2mim][OAc] and dissolved for various times and temperatures before coagulating with water. Optical microscopy was used to track the yarn’s cross-sectional area. We propose that there are two competing dissolution processes, one rate-limited by disulfide bonds at low temperatures (LTs), and a second by hydrogen bonds at high temperatures (HTs), with a crossover point between the two regimes at 70 ℃. The corresponding activation energies were ELT = 127 ± 9 kJ/mol and EHT = 34 ± 1 kJ/mol. The remaining area of the dissolved wool yarn could be shifted via time–temperature superposition to plot a single master curve of area against time for both regions. Finally, the dissolution could be modelled by a diffusion process, giving self-diffusion coefficients for the [C2mim][OAc] ions (0.64–15.31 × 10−13 m2/s).

Divisions:	Faculty of Engineering and Physical Sciences > School of Physics and Astronomy
Related resources:	Location Type https://doi.org/10.3390/ma17010244 Publication https://eprints.whiterose.ac.uk/208296/ Publication
License:	Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited:	08 Jan 2024 13:56
URI:	https://archive.researchdata.leeds.ac.uk/id/eprint/1217
Additional details Additional details Creators or authors: Creators ORCID Other ID Email Primary affiliation Primary affiliation ID Primary affiliation ID type Secondary affiliation Secondary affiliation ID Secondary affiliation ID type Alghamdi, Amjad S. https://orcid.org/0009-0006-2826-5002 University of Leeds https://ror.org/024mrxd33 ror Hine, Peter J. University of Leeds https://ror.org/024mrxd33 ror Ries, Michael https://orcid.org/0000-0002-8050-3200 University of Leeds https://ror.org/024mrxd33 ror Type of data: Dataset Publication date: 2023 Resource language: English Metadata language: English Publisher: University of Leeds Contact email: phymer@leeds.ac.uk Last Modified: 03 Sep 2024 11:40

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